CN107885546A - A kind of coordinate system conversion method towards total space information system - Google Patents
A kind of coordinate system conversion method towards total space information system Download PDFInfo
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Abstract
The invention provides a kind of coordinate system conversion method towards total space information system, belongs to geospatial information visualization field.The space transfer framework of total space information system is established, extends descriptions of the WKT to spatial reference systems, is allowed to support the coordinate systems such as definition and celestial coordinate system, the orbit coordinate system of celestial body；The georeferencing memory model based on nine-degree of freedom georeferencing tree is devised, and realizes the maintenance of georeferencing tree, the calculating of relative status and the plug-in unitization of coordinate system conversion method whereby and realizes.Total space information system can effectively be solved from macrocosm (such as fixed star, solar system inner planet) to microcosmos (as indoor), from static state to dynamic, full space and time continuous modeling and simulation from physics space-time to logic space-time, efficiency is with good expansibility and realized, can be widely applied to the numerous areas such as satellite fix and navigation, airborne and spaceborne RS, smart city, territory planning, Military Application.
Description
Technical field
The invention belongs to geospatial information to visualize field, is related to a kind of coordinate system towards total space information system and turns
Change method.
Background technology
By the development of more than 50 years, GIS-Geographic Information System had been developed as including Geographical Information Sciences, geography information
Synthesis high-tech sector including technology and geographic information application, in resource and environment, disaster and emergency response, economy and society
Development, health with life and health, planning and region design etc. field be widely applied, turn into current information-intensive society can not or
Scarce important component.But traditional GIS mainly studies earth surface system, it is of interest that with the close phase of human being's production life
The spatial surface of pass, as survey of deep space technology, the integrated earth observation technology in day vacant lot sea, indoor GIS technology, man-machine thing are mutual
Join the fast development of the emerging technology of innovation, traditional GIS gradually exposes deficiency, is faced with new opportunities and challenges.Therefore, with
Chinese Academy of Sciences Zhou Chenghu academician proposes the concept of " total space GIS-Geographic Information System " for the scholar of representative, and GIS is studied into model
Enclose from terrestrial space and be extended to cosmic space, the interior space is extended to from the exterior space, micro-space is extended to from macrospace,
Big data is extended to from small data, builds the immanent GIS worlds.
And such a total space information system is built, first have to solve is exactly georeferencing problem.Georeferencing
There is particularly important status in GIS, be the basis of the data applications such as map making, data fusion, spatial analysis.Space
With reference to have in traditional GIS the softwares such as in-depth study and realization, Proj4, ArcGIS, OGC, EPSG and tissue all to space
With reference to being described in detail and realize, but geographic coordinate system and projection coordinate of these descriptions mainly for terrestrial space
System, can not solve total space information system be extended to cosmic space from terrestrial space, micro-space be extended to from macrospace, from
Space bumpless transfer problem of the single celestial body spatial spread to numerous celestial body spaces so complexity.Therefore, there is an urgent need to provide one
The new method of kind, solves coordinate system transfer problem in total space information system.
The content of the invention
For the above situation, to overcome prior art defect, the invention provides a kind of towards total space information system
Coordinate system conversion method, can effectively solve a variety of coordinate system definition and mutual transfer problem in the case of the total space.Its skill solved
Art scheme is：The description method of total space information system georeferencing is first defined, designs total space information system on this basis
Coordinate system transfer framework, realize the conversion between coordinate system finally by georeferencing tree.
A kind of coordinate system conversion method towards total space information system, it is characterised in that comprise the following steps：
The first step, measuring point coordinate is inputted, the measuring point coordinate is terrestrial coordinates point or celestial body coordinate points, the measuring point coordinate
Acquisition include GPS is measured or Beidou satellite navigation system measurement or vector obtain etc., the measurement accuracy can be real according to engineering
Border is required to be adjusted, and the measuring point coordinate is stored by memory cell, and the memory cell should meet that data are adjusted automatically
Take, to realize that storage and reading, storage format can be set or be changed as needed computer automatically；
Second step, defines the description method of total space information system georeferencing, and the description method includes defining object
Space describes with world space, the georeferencing description of object itself, father and son's object space referring-to relation, wherein, define object
Space refers to that in total space information system each object space of itself is referred to as object space, is sat with object with world space
Mark system describes, and the object coordinate system is Local coordinate system, and the space for accommodating all object of observations is referred to as world's sky
Between, described with world coordinate system, world space is related with total collection of object being observed to world coordinate system, by observing
Person determines；The georeferencing of one object is described including two parts, first, the spatial reference systems of object itself, are used for
All elements in self space are described；Second, object and the spatial relationship with its parent object；The space ginseng of the object itself
Description to be examined to refer to be extended total space information system on the basis of WKT, the extension is realized automatically using computer, with
Compatible traditional GIS, and the space system description of more both macro and micro is supported, the extension includes first extension and second
Individual extension, first extension are to increase the definition of celestial body up front, and second extension is increase celestial coordinate system
The traditional GIS such as system, orbit coordinate system, object coordinate system without reference to coordinate system, father and son's object space reference
Relationship description refer to when total space information system describes to the text of father and son's object space referring-to relation support Rotate, Scale,
The semantic description such as Transform, GeoCoord (geo-location), Matrix, and it is converted into 4*4 squares in internal memory computing
Battle array；
3rd step：Total space information system coordinate system transduction pathway and framework are designed, the transduction pathway and framework are at least
Changing between the celestial coordinate system including same celestial body, changing between the celestial body coordinate system of same celestial body, the celestial sphere of same celestial body
Changing between coordinate system and celestial body coordinate system, the celestial coordinate system of different celestial bodies to the conversion between the celestial coordinate system of the earth's core；
4th step：In the description method and transduction pathway with framework, realizing that the total space is believed to the measuring point coordinate of acquisition
Coordinate system conversion in breath system, the step are set including establishing nine-degree of freedom georeferencing tree, calculating space state, plug-in unit
Meter and realization, the coordinate system conversion in total space information system is realized, wherein nine-degree of freedom georeferencing tree is the tree-shaped knot of dynamic
Structure, object are a nodes for tree, and spatial reference systems are the base attributes of Object node, the space-time transformation of object and subobject
Relation is described by spatial alternation node, and spatial alternation node includes a coordinate system transformation the node to father node
The transformation matrix of coordinate system, the transformation matrix can describe nine-degree of freedom spatiality of the node relative to father node；It is described
The calculating of relative status refers to that in nine-degree of freedom georeferencing tree the inquiry of space state, which calculates, to be needed according to nine freely
Father and son's node relationships in degree georeferencing tree are iterated calculating and coordinate transform, and the insert design refers to empty with realization
Between frame of reference and its conversion designs be card format, the extension of spatial reference systems is realized using insert design.
Preferably, define object space and world space described in second step, as object of observation A and object B, such as
Fruit great-jump-forward observes A and B, can assign A coordinate system as world coordinate system when observing A, can be B seat during observation B
Mark system is as world coordinate system；If Continuous Observation A and B, a world coordinate system is needed to cover A coordinates
System and B coordinate systems.
Formulated preferably, WKT described in the 3rd step is OGC, descriptions of the OGC to spatial reference systems is：
<coordinate system>=<horz cs>|<geocentric cs>|<vert cs>|<compd cs>|<
fitted cs>| <local cs>
<horz cs>=<geographic cs>|<projected cs>,
Form is after the extension of first extension：
<coordinate system>=<celestial body>[<horz cs>|<geocentric cs>|<vert
cs>|<compd cs> |<fitted cs>|<local cs>]。
Preferably, the object coordinate system described in the 3rd step in second extension can use<fitted cs>With<
local cs>Description, but for dynamic object, object coordinate system is for the coordinate system of parent object
It is continually changing, i.e.,<to base>Be change, it is necessary to computer calculates in real time, therefore extend a kind of coordinate system again, extend
Form is as follows afterwards：
<coordinate system>=<celestial body>[<horz cs>|<geocentric cs>|<vert
cs>|<compd cs> |<fitted cs>|<local cs>|<celestial cs>|<orbit cs>|<thing-in-
itselfcs>]
<horz cs>=<geographic cs>|<projected cs>
<fitted cs>=FITTED_CS ["<name>",<to base>,<base cs>].
Preferably, the conversion described in the 3rd step between the celestial coordinate system of same celestial body is built upon same celestial body barycenter
On different celestial coordinate systems between conversion, including conversion between instantaneous coordinate system and instantaneous coordinate system and agreement coordinate system
Between conversion, the instantaneous coordinate system includes the horizontal system of coordinates, hour angle system of coordinate, the equatorial system of coordinates and ecliptic system of coordinates, described
Conversion between the celestial body coordinate system of same celestial body refers to that the conversion between the solid coordinate system of the different stars of same celestial body, including right angle are sat
Conversion between mark system, between geographic coordinate system, between geography and rectangular coordinate system and between geographical and projected coordinate system,
The solid coordinate system of the different stars is consolidated with including, the moon is solid, the conversion between the celestial coordinate system and celestial body coordinate system of the same celestial body
Refer to the conversion between agreement celestial coordinate system and agreement celestial body coordinate system.
Preferably, the celestial coordinate system of different celestial bodies described in the 3rd step is to being converted between the celestial coordinate system of the earth's core
To during conversion between the celestial coordinate system of the earth's core, its expression-form is the celestial coordinate system of the moon:J2000.0 the earth's core mean equator is sat
Conversion between mark system and the J2000.0 month heart flat ball equatorial system of coordinates.
Preferably, when establishing nine-degree of freedom georeferencing tree in the 4th step, georeferencing memory model is carried out
Design, the design of the georeferencing memory model include two aspects：First, spatiality is safeguarded, include the wound of space nodes
Build, destroy, dynamic hinge, releasing hinge, spatiality update；Second, the calculating of space state.
Preferably, also include the maintenance of georeferencing tree in the 4th step, in the maintenance, georeferencing tree be with
Node tree intersects, and is changed in node tree, that is, when inserting and deleting, georeferencing tree also accordingly becomes
Change, the spatial reference systems in Object node are the attributes of object itself, and spatial alternation node is responsible for parent object space-time referential
Conversion between system and subobject space-time frame of reference, when child node is added to father node, dynamic creation spatial alternation section
Put and calculate transition matrix.
Preferably, divided when space state is calculated in the 4th step according to the relation between two spaces node
For two following situations processing：1) node is the ancestor node of another node, under such a situation, is led between two nodes
Some intermediate node associations for forming set membership successively are crossed, space state computation can pass through the phase between space nodes
Relation is obtained, 2) two nodes be not mutually other side ancestor node, can not be by some between two nodes under such a situation
The intermediate node association of set membership is formed successively, and now, the space length between two nodes can use the world with posture
Spatial reference systems are calculated as conversion bridge, but when path is larger compared with chronistor calculation amount；One can also be found jointly
Ancestor node calculated as conversion bridge, but the lookup of common ancestor's node is cumbersome；For on same celestial body
Two nodes, celestial body node can be used to provide the conversion square to celestial body spatial reference systems as bridge, each Object node
The quick interface of battle array.
Preferably, in the insert design and realization of the 4th step, for same celestial body, it is desirable to provide star is used to star
Gu, star be affixed to that star is used, star is used to star is used, star is affixed to solid four translation interfaces of star, for the earth, each star is used with the solid coordinate of star
Changing using GCRS and CGCS2000 into bridge between system, is voluntarily controlled by user, and system default offer star is used to star consolidate and star
The high-performance for being affixed to the used basic accuracy of star realizes that the realization for high-precision low performance is defined by the user.
Conversion method provided by the invention solves total space information system and is extended to cosmic space, from grand from terrestrial space
Space bumpless transfer of the Space Expanding to micro-space, so complicated from single celestial body spatial spread to numerous celestial body spaces is seen to ask
Inscribe, computational accuracy and computational efficiency can meet to require, improve the accuracy and reliability of Coordinate Conversion.Pass through computer
Realization and insert design, have effectively expanded the application of GIS technology, have been with good expansibility and realize efficiency, can answer extensively
For the numerous areas such as satellite fix and navigation, airborne and spaceborne RS, smart city, territory planning, Military Application.
Brief description of the drawings
Coordinate system transfer framework in Fig. 1 total space information systems.
Transduction pathway between the celestial coordinate system of the same celestial bodies of Fig. 2.
Transduction pathway between the celestial coordinate system and celestial body coordinate system of the same celestial bodies of Fig. 3.
The memory model of Fig. 4 total space information system georeferencings.
The used transduction pathway between the solid coordinate system of star of each star on Fig. 5 earth.
Embodiment
To make the purpose of the present invention, technical scheme, advantage clearer, the present invention is done further below in conjunction with accompanying drawing
Detailed description.
The present invention's is embodied as：The description method of total space information system georeferencing is first defined, on this basis
The coordinate system transfer framework of total space information system is designed, the conversion between coordinate system is realized finally by georeferencing tree.Tool
Body step is as follows：
1st, measuring point coordinate is inputted
The measuring point coordinate is terrestrial coordinates point or celestial body coordinate points, the acquisition of the measuring point coordinate include GPS measure or
Beidou satellite navigation system is measured or vector obtains etc., and the measurement accuracy can be adjusted according to engineering requirements, described
Measuring point coordinate is stored by memory cell, and the memory cell should meet that data are transferred automatically, to realize that computer is automatic
Storage and reading, storage format can be set or be changed as needed；
2nd, the description method of total space information system georeferencing is defined
(1) object space and world space
In total space information system, each object space of itself is referred to as object space, with object coordinate system (also referred to as
For Local coordinate system) description.The space for accommodating all object of observations is referred to as world space, is described with world coordinate system, does not have
There are absolute space and absolute coordinate system.World space is related with total collection of object being observed to world coordinate system, by seeing
Survey person determines., can be using A coordinate system as generation when observing A if great-jump-forward observes A and B such as object of observation A and object B
Boundary's coordinate system, observe B when can be using B coordinate system as world coordinate system；If Continuous Observation A and B, need one
Individual world coordinate system can cover A coordinate systems and B coordinate systems.
The georeferencing of one object is described, including two parts, first, the spatial reference systems of object itself, are used
All elements in description self space；Second, the spatial relationship of the object and parent object.Such as：Describe a people, it is necessary to
The spatial reference systems of human body itself --- human body coordinate system is united, while the spatial relationship of the human body and parent object is further described,
As on mobile vehicle, aircraft it is first-class.
(2) the georeferencing description of object itself
WKT is that OGC is formulated, retouched by the text that spatial reference systems widely used GIS and spatial reference systems are changed
Predicate says that the WKT character strings of a representation space frame of reference describe geodetic benchmark, geoid, the seat of space object
Mark system and map projection.Total space information system is extended on the basis of WKT, with compatible traditional GIS, and is supported more
The space system description of both macro and micro.
OGC is described as follows to spatial reference systems：
<coordinate system>=<horz cs>|<geocentric cs>|<vert cs>|<compd cs>|<
fitted cs>| <local cs>
<horz cs>=<geographic cs>|<projected cs>
First extension of total space information system is to increase the definition of celestial body up front, and form is as follows after extension：
<coordinate system>=<celestial body>[<horz cs>|<geocentric cs>|<vert
cs>|<compd cs> |<fitted cs>|<local cs>]
It is compatible, tellurian geographical seat with traditional GIS for the spatial reference systems (star is admittedly) on single celestial body
Mark is that need to only increase EARTH before GEOGCS, and the geographic coordinate system on the moon only needs to increase MOON, the like.
Second extension of total space information system is increase celestial coordinate system, orbit coordinate system, object coordinates system
System etc. traditional GIS without reference to coordinate system.Object coordinate system can use<fitted cs>With<local cs>Retouch
State, but for dynamic object, object coordinate system be for the coordinate system of parent object it is continually changing, i.e.,
<to base>Be change, it is necessary to real-time calculating, therefore extend a kind of coordinate system again.Form is as follows after extension：
<coordinate system>=<celestial body>[<horz cs>|<geocentric cs>|<vert
cs>|<compd cs> |<fitted cs>|<local cs>|<celestial cs>|<orbit cs>|<thing-in-
itselfcs>]
<horz cs>=<geographic cs>|<projected cs>
<fitted cs>=FITTED_CS ["<name>",<to base>,<base cs>]
(3) father and son's object space referring-to relation describes
Father and son's object generally there are space correlation relation, and subobject can be with parent object movement, rotation, while subobject meeting
Relative to parent object movement, rotation, also converted for the geometric shape of object in the presence of scaling, projection etc..Total space information system
Support that (geography is fixed by Rotate, Scale, Transform, GeoCoord when being described to the text of father and son's object space referring-to relation
Position), the semantic description such as Matrix, and be converted into 4*4 matrixes in internal memory computing.
3rd, total space information system coordinate system transfer framework is designed
Conversion between two coordinate systems is usually required by multiple switch process, as Satellite imagery is positive geographical
The coordinate system commonly used in location algorithm is followed successively by：Sensor local Coordinate System → remote sensing platform body coordinate system → orbit coordinate
System → geocentric inertial coordinate system → the earth's core fixed coordinate system, finally enter under the fixed coordinate system of the earth's core line sensor sight line vector and
The solution of earth surface intersection point.Have been carried out largely studying for the conversion of all kinds of coordinate systems between any two, and continuous
Raising conversion precision, IAU, GPL and traditional GIS software and tissue etc. provide substantial amounts of conversion parameter and conversion
Program.Total space information system is related to all kinds of coordinate systems, it is important to the transduction pathway and framework established between coordinate system, such as Fig. 1 institutes
Show.
(1) conversion between the celestial coordinate system of same celestial body
This is built upon the conversion between the different celestial coordinate systems on same celestial body barycenter, including instantaneous coordinate system (
Flat coordinate system, hour angle system of coordinate, the equatorial system of coordinates and ecliptic system of coordinates) between conversion and instantaneous coordinate system and agreement coordinate system
Between conversion.Equator of date coordinate system (true celestial coordinate system) is the bridge of conversion.
(2) conversion between the celestial body coordinate system of same celestial body
This is the conversion between the solid coordinate system such as (consolidate the solid, moon) of the different stars of same celestial body, including rectangular coordinate system it
Between, the conversion between geographic coordinate system, between geographical and rectangular coordinate system and between geographical and projected coordinate system, in tradition
Existing ripe realization in GIS.
(3) conversion between the celestial coordinate system of same celestial body and celestial body coordinate system
Conversion between the celestial coordinate system and celestial body coordinate system of same celestial body typically refers to agreement celestial coordinate system and agreement
Conversion between celestial body coordinate system, because the erratic behavior in celestial body motion process, this conversion are extremely complex.Such as the earth's core agreement day
Conversion between spherical coordinate system and the earth's core conventional terrestrial coordinate system.This transfer process is related to the precession of the equinoxes, nutating, ocean, atmospheric tide
Etc. the influence of factor, parameter up to 1000 multinomial (678 lunisolar nutation items and 687 in IAU 2000A/B nutation models
Planet nutating item), its precision is 0.2mas.
(4) celestial coordinate system of different celestial bodies is to the conversion between the celestial coordinate system of the earth's core
Such as the conversion between J2000.0 the earth's core mean equator coordinate system and the J2000.0 month heart flat ball equatorial system of coordinates.
The coordinate system transfer framework is shown in Fig. 2.
4th, the coordinate system conversion in total space information system is realized
In the description method and transduction pathway with framework, being realized to the measuring point coordinate of acquisition in total space information system
Coordinate system conversion.
(1) nine-degree of freedom georeferencing tree
The design of georeferencing memory model mainly considers two aspects：First, spatiality is safeguarded, such as the wound of space nodes
Build, destroy, dynamic hinge, releasing hinge, spatiality update；Second, the calculating of space state.Meanwhile in georeferencing
Deposit the design of model and realization also needs to consider the demand of standardization and ease for use, fundamentally ensure the uniformity of space-time, promote
Enter the reusability and interoperability of model.
Whole scene uses dynamic tree, and object is a node for tree, and spatial reference systems are Object nodes
The space-time transformation relation of base attribute, object and subobject is described by spatial alternation node, and spatial alternation node is field
One kind of scape node, the transformation matrix of coordinate system transformation to father node coordinate system comprising one the node (can describe this
Node relative to father node nine-degree of freedom spatiality).
World space frame of reference is determined by observer, observes the time for determining observation, observation position with seeing
Examine angle etc..When system supports multiple viewports, i.e. multiple observers, multiple world space frames of reference be present.Celestial body node
It is a special Object node, in order to simplify and calculate.Non-physical object includes figure, word etc., whole in order to improve
The efficiency of individual system, non-physical Object node can be multiplexed, therefore have multiple father nodes.
(2) maintenance of georeferencing tree
Georeferencing tree is to intersect with node tree, empty when node tree changes (insertion and deletion)
Between reference tree also accordingly change.
Spatial reference systems in Object node are the attributes of object itself, and spatial alternation node is responsible for parent object space-time ginseng
Conversion between test system and subobject space-time frame of reference, when child node is added to father node, dynamic creation space becomes
Change node and calculate transition matrix.When transition matrix and time correlation (as solid system be used to be conversion matrix) or subobject
(such as aircraft is flying) is, it is necessary to update the transformation matrix of space-time transformation node per frame during relative motion.When subobject is from parent object
(become self-movement object) during disengaging, while subobject is deleted from original parent object, spatial alternation corresponding to deletion
Node, and re-create spatial alternation node (parent object is changed, and such as becomes the earth by original parent object).
(3) calculating of relative status
In space tree, the inquiry of space state, which calculates, needs father and son's node relationships in space tree to be changed
In generation, calculates and coordinate transform.According to the relation between two spaces node, it is divided into two following situations processing：
Situation 1：One node is the ancestor node of another node
Under such a situation, associated between two nodes by some intermediate nodes for forming set membership successively, it is relatively empty
Between state computation can be obtained by the relativeness between space nodes.
Situation 2：Two nodes are not mutually the ancestor node of other side
Under such a situation, it can not be associated between two nodes by some intermediate nodes for forming set membership successively.This
When, the space length between two nodes can use world space frame of reference to be calculated as conversion bridge with posture,
But when path is larger compared with chronistor calculation amount；A common ancestor node can also be found to be calculated as conversion bridge, but
The lookup of common ancestor's node is cumbersome；For two nodes on same celestial body, celestial body node can be used as bridge,
Each Object node provides the quick interface of transition matrix to celestial body spatial reference systems.
(4) insert design is with realizing
Be card format spatial reference systems and its conversion designs, mainly consider precision and balance of efficiency, it is professional,
The problems such as autgmentability.For the conversion between previously described the earth's core agreement celestial coordinate system and the earth's core conventional terrestrial coordinate system,
Some fields are to this requirement very high (parameter of nutation model up to 1000 is multinomial), such as high-precision military surveying and mapping support and space
Geodesic survey, also there are many fields need not such high precision.Total space information system application field is extensive, each professional point
It is numerous that analysis calculating is related to coordinate system, strongly professional, or even some are underground, can be very good to solve using insert design empty
Between frame of reference in each professional scaling problem.
For same celestial body, it is desirable to provide star is used to star is solid, star is affixed to that star is used, star is used to star is used, star is affixed to star and consolidated
Four translation interfaces, wherein X represents celestial body, for the earth, the used conversion consolidated with star between coordinate system of each star with GCRS and
CGCS2000 is bridge, is voluntarily controlled by user, system default provide star be used to star is solid and star be affixed to star it is used (GCRS with
Conversion between CGCS2000) the high-performance of basic accuracy realize that the realization for high-precision low performance is defined by the user.
Conversion between the inertial system of different celestial bodies, generally use NASA (NASA) JPL (jet-propulsions
Laboratory) the planet precision ephemeris (DE402-DE431/LE402-LE431 etc.) that provides realized.
Specifically, can be realized as follows：
1. couple OGC georeferencing describing mode is extended, total space information system can be supported.Using the earth as
Example, the georeferencing describing mode after it extends are：
EARTH[GEOGCS["GCS_Beijing_1954",DATUM["D_Beijing_1954",SPHEROID["
Krasovsk y_1940",6378245,298.3]],PRIMEM["Greenwich",0],UNIT["Degree",
0.017453292519943295]]]
Projected coordinate system with geographic coordinate system be it is similar, such as：
EARTH[PROJCS["Beijing_1954_GK_Zone_19N",GEOGCS["GCS_Beijing_1954",
DATUM[ "D_Beijing_1954",SPHEROID["Krasovsky_1940",6378245,298.3]],PRIMEM["
Greenwich",0],UN IT["Degree",0.017453292519943295]],PROJECTION["Gauss_
Kruger"],PARAMETER["False_Ea sting",500000],PARAMETER["False_Northing",0],
PARAMETER["Central_Meridian",111],PARA METER["Scale_Factor",1],PARAMETER["
Latitude_Of_Origin",0],UNIT["Meter",1]]]
2. transduction pathway and framework between establishing all kinds of coordinate systems.Fig. 1 gives the transduction pathway between all kinds of coordinate systems
With framework, mainly include：Changing between the celestial coordinate system of same celestial body, changing, together between the celestial body coordinate system of same celestial body
Conversion between the celestial coordinate system and celestial body coordinate system of one celestial body, and different celestial bodies celestial coordinate system to the earth's core celestial coordinate
Conversion between system.Wherein, Fig. 2 gives the conversion regime between the celestial coordinate system of same celestial body, and Fig. 3 gives same celestial body
Celestial coordinate system and celestial body coordinate system between conversion regime.
3. nine-degree of freedom georeferencing tree is established, to realize that the coordinate system in total space information system is changed.Fig. 4 is provided
The memory model of tree-dimensional test system in total space information system.
4. all kinds of spatial reference systems and its mutually conversion are realized by plug-in unit mode.Fig. 5 gives tellurian star and is used to
To star is solid, star is affixed to that star is used, star is used to the conversion regime that star is used, star is affixed to solid four translation interfaces of star.
Content described in this specification embodiment is only enumerating to the way of realization of present inventive concept, guarantor of the invention
Shield scope is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also includes this area skill
Art personnel according to present inventive concept it is conceivable that equivalent technologies mean.
Claims (10)
1. a kind of coordinate system conversion method towards total space information system, it is characterised in that comprise the following steps：
The first step, measuring point coordinate is inputted, the measuring point coordinate is terrestrial coordinates point or celestial body coordinate points, and the measuring point coordinate obtains
Take including GPS measurements or Beidou satellite navigation system measurement or vector acquisition etc., the measurement accuracy can be actually subjected to according to engineering
To ask and be adjusted, the measuring point coordinate is stored by memory cell, and the memory cell should meet that data are transferred automatically, with
Realize that storage and reading, storage format can be set or be changed as needed computer automatically；
Second step, defines the description method of total space information system georeferencing, and the description method includes defining object space
Georeferencing description, father and son's object space referring-to relation with world space, object itself describe, wherein, define object space
Refer to world space in total space information system, each object space of itself is referred to as object space, with object coordinates system
System description, the object coordinate system is Local coordinate system, and the space for accommodating all object of observations is referred to as world space, is used
World coordinate system describes, and world space is related with total collection of object being observed to world coordinate system, is determined by observer
It is fixed；The georeferencing of one object is described including two parts, when the spatial reference systems of object itself, for describing
All elements in self space；Second, object and the spatial relationship with its parent object；The object georeferencing of itself is retouched
State and refer to be extended total space information system on the basis of WKT, the extension is realized automatically using computer, with compatibility
Traditional GIS, and the space system description of more both macro and micro is supported, the extension includes first extension and second expansion
Exhibition, first extension are to increase the definition of celestial body up front, and second extension is increase celestial coordinate system, rail
The traditional GISs such as road coordinate system, object coordinate system without reference to coordinate system, father and son's object space referring-to relation retouches
State refer to when total space information system describes to the text of father and son's object space referring-to relation support Rotate, Scale,
The semantic description such as Transform, GeoCoord (geo-location), Matrix, and it is converted into 4*4 squares in internal memory computing
Battle array；
3rd step：Design total space information system coordinate system transduction pathway and framework, the transduction pathway comprise at least with framework
Changing between the celestial coordinate system of same celestial body, changing between the celestial body coordinate system of same celestial body, the celestial coordinate of same celestial body
It is and changing between celestial body coordinate system, the celestial coordinate system of different celestial bodies to the conversion between the celestial coordinate system of the earth's core；
4th step：In the description method and transduction pathway with framework, total space information system is realized to the measuring point coordinate of acquisition
Coordinate system conversion in system, the step include establishing nine-degree of freedom georeferencing tree, calculate space state, insert design and
Realize, realize the coordinate system conversion in total space information system, wherein nine-degree of freedom georeferencing tree is dynamic tree, right
As if a node for tree, spatial reference systems are the space-time transformation relations of the base attribute of Object node, object and subobject
Described by spatial alternation node, spatial alternation node includes a coordinate system transformation the node to father node coordinate
The transformation matrix of system, the transformation matrix can describe nine-degree of freedom spatiality of the node relative to father node；It is described relative
The calculating of state refers to that in nine-degree of freedom georeferencing tree the inquiry of space state, which calculates, to be needed according to nine-degree of freedom sky
Between father and son's node relationships in reference tree be iterated calculating and coordinate transform, the insert design with realization refer to space to join
Test system and its conversion designs are card format, and the extension of spatial reference systems is realized using insert design.
A kind of 2. coordinate system conversion method towards total space information system as claimed in claim 1, it is characterised in that：Second
In the object space that defines with world space, as object of observation A and object B, if great-jump-forward observes A and B, observing in step
Can be using A coordinate system as world coordinate system during A, can be using B coordinate system as world coordinate system when observing B
System；If Continuous Observation A and B, a world coordinate system is needed to cover A coordinate systems and B coordinate systems.
A kind of 3. coordinate system conversion method towards total space information system as claimed in claim 1 or 2, it is characterised in that：
WKT described in 3rd step is that OGC is formulated, and descriptions of the OGC to spatial reference systems is：
<coordinatesystem>=<horzcs>|<geocentriccs>|<vertcs>|<compdcs>|<fittedcs>
|<localcs>
<horzcs>=<geographiccs>|<projectedcs>,
Form is after the extension of first extension：
<coordinatesystem>=<celestialbody>[<horzcs>|<geocentriccs>|<vertcs>|<
compdcs>|<fittedcs>|<localcs>]。
A kind of 4. coordinate system conversion method towards total space information system as claimed in claim 3, it is characterised in that：3rd
Object coordinate system described in step in second extension can use<fittedcs>With<localcs>Description, but for dynamic
For the object of state, object coordinate system be for the coordinate system of parent object it is continually changing, i.e.,<tobase>It is
Change, it is necessary to computer calculates in real time, therefore extend a kind of coordinate system again, form is as follows after extension：
A kind of 5. coordinate system conversion method towards total space information system as claimed in claim 1, it is characterised in that：3rd
Conversion described in step between the celestial coordinate system of same celestial body be built upon different celestial coordinate systems on same celestial body barycenter it
Between conversion, including the conversion between instantaneous coordinate system and the conversion between instantaneous coordinate system and agreement coordinate system are described instantaneous to sit
Mark system includes the horizontal system of coordinates, hour angle system of coordinate, the equatorial system of coordinates and ecliptic system of coordinates, the celestial body coordinate system of the same celestial body
Between conversion refer to conversion between the solid coordinate system of the different stars of same celestial body, including between rectangular coordinate system, geographic coordinate system
Between, the conversion between geographical and rectangular coordinate system and between geographical and projected coordinate system, the different star Gu Zuobiaoxibao
Include it is solid, the moon is solid, the conversion between the celestial coordinate system and celestial body coordinate system of the same celestial body refer to agreement celestial coordinate system with
Conversion between agreement celestial body coordinate system.
A kind of 6. coordinate system conversion method towards total space information system as claimed in claim 5, it is characterised in that：3rd
The celestial coordinate system of different celestial bodies described in step to the celestial coordinate system for being converted to the moon between the celestial coordinate system of the earth's core to ground
During conversion between heart celestial coordinate system, its expression-form is:J2000.0 the earth's core mean equator coordinate system is put down with the J2000.0 month hearts
Conversion between terrestrial equator coordinate system.
A kind of 7. coordinate system conversion method towards total space information system as claimed in claim 1, it is characterised in that：It is described
When nine-degree of freedom georeferencing tree is established in the 4th step, the design of georeferencing memory model, the georeferencing internal memory are carried out
The design of model includes two aspects：First, spatiality is safeguarded, including establishment, destruction, dynamic hinge, the releasing of space nodes are cut with scissors
Chain, spatiality renewal；Second, the calculating of space state.
8. a kind of coordinate system conversion method towards total space information system as described in claim any one of 1-7, its feature
It is：Also include the maintenance of georeferencing tree in 4th step, in the maintenance, it with node tree is to intersect that georeferencing tree, which is,
Together, changed in node tree, that is, when inserting and deleting, georeferencing tree also accordingly changes, in Object node
Spatial reference systems be object itself attribute, spatial alternation node is responsible for parent object space-time frame of reference and subobject space-time
Conversion between frame of reference, when child node is added to father node, dynamic creation spatial alternation node simultaneously calculates conversion square
Battle array.
9. a kind of coordinate system conversion method towards total space information system as described in claim any one of 1-8, its feature
It is：According to the relation between two spaces node when calculating space state in the 4th step, it is divided into following two feelings
Shape processing：1) node is the ancestor node of another node, under such a situation, passes through some structures successively between two nodes
Intermediate node into set membership is associated, and space state computation can be obtained by the relativeness between space nodes,
2) two nodes are not mutually the ancestor node of other side, and under such a situation, father can not be formed successively by some between two nodes
The intermediate node association of subrelation, now, the space length between two nodes can use world space referential with posture
System is calculated as conversion bridge, but when path is larger compared with chronistor calculation amount；A common ancestor node can also be found
Calculated as conversion bridge, but the lookup of common ancestor's node is cumbersome；, can for two nodes on same celestial body
To use celestial body node to provide the quick interface of transition matrix to celestial body spatial reference systems as bridge, each Object node.
10. a kind of coordinate system conversion method towards total space information system as described in claim any one of 1-9, its feature
It is：In the insert design and realization of the 4th step, for same celestial body, it is desirable to provide star is used to star is consolidated, star is affixed to star
Used, star is used to star is used, star is affixed to solid four translation interfaces of star, for the earth, turn between the used solid coordinate system with star of each star
Change using GCRS and CGCS2000 as bridge, voluntarily controlled by user, system default offer star is used to star admittedly and star is affixed to what star was used to
The high-performance of basic accuracy realizes that the realization for high-precision low performance is defined by the user.
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